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Finding the Fourth Proportional to 12,471.74, 18,707.55 and 5,074.44

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Solution

The fourth proportional to 12,471.74, 18,707.55 and 5,074.44 is: 7,611.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,471.74 : 18,707.55 = 5,074.44 : x
  2. Step 2: Convert to fraction form
    12,471.74/18,707.55 = 5,074.44/x
  3. Step 3: Cross multiply
    12,471.74x = 18,707.55 × 5,074.44
  4. Step 4: Simplify right side
    12,471.74x = 94,930,340.02
  5. Step 5: Solve for x
    x = 94,930,340.02/12,471.74
  6. Step 6: Final answer
    x = 7,611.64

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.